Abstract
Maney students proposed to evaluate coking coals by the petro. graphical method and recognized in principle the utilities for coking industries, but the method, which as yet beeingmeasurerd manualy seemed to be difficult to apply for this purpose, since it meeds too much time and labor.
We attempted and suceeded to develope an automatic reflectivity classifying and recording equipment in order to use it for plant blend controll as well as in research investigations.
This new equipment enables the accurate measurement of mean reflectance of Vitrinit and distinguishes the main maceral components to be made more rapidly using a mechanical microscope stage and the automatic electronic classifying and recording equipment, which connectes directly to a Computer and produces the results in histogram form for discfilo read out, C. R. T.(Cathod Roy Tube) or typewriter.
